"NASA’s Apollo 13 Scrubbing Protocol"

"When an oxygen tank exploded on Apollo 13, the crew faced deadly carbon dioxide buildup. Engineers on the ground had to quickly design a filter using only materials available on the spacecraft, like plastic bags and duct tape. This improvised, last-minute solution was successful and saved the astronauts' lives."
Lee's orders to Hill were lost by a courier who was on his way to deliver them to Hill.
The document was Lee's orders to Hill, which also showed the disposition of the Lee's units, NOT McClellan's.
And what made finding the plans historically significant was the fact that McClellan DIDN'T act on them in time to take advantage of them. In fact, that's why McClellan was relieved of command after the battle.
Talk about getting the story ass backwards!
What the description is about and what you're saying are two different things. Crossing the Alps was not without casualties for Hannibal, though I can't say whether this one, in particular, was so. He did replenish forces along the way, too.